I'd stick with the tried and true stuff - Detroit or ARB.
I like the idea of OX... Several years ago there was some stuff floating around about them going bankrupt or getting bought and not able to service warrantee and other customer requests. Has that all been resolved?
Only technical complaint I've heard about OX is that it might take a few tries to get the cable shifter sorted as it stretches with use. Once it's been used enough you are good to go though.